Isotopes (AQA GCSE Physics Combined Science): Quizzes
📚Quizzes
Practise the questions
15 questions from this quiz
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Practise the questions
15 questions from this quiz
What do all atoms of the same element have?
What do all atoms of the same element have?
Same number of protons
In a neutral atom, what is true about electrons and protons?
In a neutral atom, what is true about electrons and protons?
They are equal in number
What are isotopes?
What are isotopes?
Same element, different masses
What is different in isotopes of the same element?
What is different in isotopes of the same element?
Number of neutrons
What does the mass number () represent?
What does the mass number () represent?
Neutrons and protons combined
If an atom has more electrons than protons, what charge does it have?
If an atom has more electrons than protons, what charge does it have?
Negative charge
What does not change for a certain element?
What does not change for a certain element?
Number of protons
How many stable isotopes do most elements typically have?
How many stable isotopes do most elements typically have?
One or two
What do radioactive substances release from their nucleus?
What do radioactive substances release from their nucleus?
Ionising radiation
What is the process called when an unstable nucleus gives out radiation?
What is the process called when an unstable nucleus gives out radiation?
Radioactive decay
What is the unit for measuring activity of radioactive decay?
What is the unit for measuring activity of radioactive decay?
Becquerel (Bq)
What does equal?
What does equal?
1 decay per second
What is used to measure the activity of a radioactive source?
What is used to measure the activity of a radioactive source?
Geiger-Muller tube
What is count-rate?
What is count-rate?
Decays recorded each second
What is true about radioactive decay?
What is true about radioactive decay?
It is a totally random process